diff --git a/maintenance.py b/maintenance.py
index dbafdac..7dd9ee3 100644
--- a/maintenance.py
+++ b/maintenance.py
@@ -238,7 +238,7 @@ class Maintenance(Workflow, ModelSQL, ModelView):
                                         ('propietary_address', '=', Eval('propietary_address'))],
                                 states=_states,
                                 depends=['service_maintenance'])
-    equipment_calibrate = fields.Boolean("Calibrate Equipment", states={'readonly': False})
+    equipment_calibrate = fields.Boolean("Calibrate Equipment", states={'readonly': True})
     #when the maintenance is in agended status
     diary = fields.One2Many('optical_equipment_maintenance.diary', 'diary')
     #Preventive maintenance
diff --git a/view/maintenance_form.xml b/view/maintenance_form.xml
index e756537..3015151 100644
--- a/view/maintenance_form.xml
+++ b/view/maintenance_form.xml
@@ -16,8 +16,8 @@
     <field name="equipment"/>
     <label name="service_maintenance"/>
     <field name="service_maintenance"/>
-    <label name="equipment_calibrate" invisible="0"/>
-    <field name="equipment_calibrate" invisible="0"/>    
+    <label name="equipment_calibrate" invisible="1"/>
+    <field name="equipment_calibrate" invisible="1"/>    
     <newline/>
     <label name="description_activity"/>
     <field name="description_activity" colspan="3"/>